Electric switch.



J. P. MUELROY.

BLEGTRC SWITCH.

APPLIGATIQN rum) SEPT. 1e, w09.

1,@75,985 Paented Oct. M, 15H3.

UNTTED STATES PATENT QFFCE.

JAMESF. MCELROY, OF ALBANY, NEVU YORK7 ASSIGNOR TOv CONSOLIDATED CABf- HEATING COMPANY, A CORE'RATION OFXVES'F VIRGINIA.. i

ELECTRIC sWrrGH.

Specification of Letters Patenti Patented oet.. ira-,1913.

Application filed September 18, 1909. Serial. No. 517,959.

To all whom in (/i/ m7166171.

lle it known that Jam-1s F, MelCLRoY, a ritiZen of the United States. residing at Albany, County of Albany. State of New York. have invented certain new and ueetul lini'n-ovenients in Electric Switebefs. the tollowing being a full, clear, and art di, closure ot' the one torni of niv invention which l at present deeni preferable.

For a. detailed description ol the present 'forni of in;Y invention. refer invr may be had to the following specitieation and to the a r-onipanyingdrawinga torn'iingy a pa rt thereof. in whichl Figure l is a plan view of niv szwitr-h with the inclosing ease removed. Fig. is a lon- Lgitudinal Seetion thereof, and Fig. 5l a tranf;A Verne Section.

Il invention relates to an elet-trie switch particularlj\v designed for use in the cabs ot' electric railway ears to control an electric heater in the eab. the heater being connected in Series; with other heaters` in the bodv of the car and provided with a ,horteirei iiting connection ineludilngT my switch. Thus the heater put into circuit by opening the switch, while the closing` of the Switch short circuits itand renders it inactive.

My switrh is of the knife-blade type and each blade ir; roinposed of two parallel spi-ingaffonneeted jaws pivoted together at one end. Both blades act together as a yeingle switch-blade.y both enteringr the receiving clip and connecting electrically therewith7 while the operating handle is attached to the outer blade so that, in opening the Switch7 the outer blade is tiret. drawn out of the elip by the handle and the Second blade follows by reason of the pull of the spring which connects; the two blades. employ a pair of such :h bladen to mahe up a doublcpole switch. the two upper blades being cross connected by an i'ifuilatin;r bloei( to which the operating han le conneeted.y the hanr die being; o" '-oi i 'able length. sinn-e the l ep enough to runat oe u range of throw of the surrmindiana eanin permit the neet-s.

fawiteb blade.

'llo guide the handle l provideba special g'uideftandard mounted on the baSe and havingr at ittupper end a eireular opening or cve through which the handle passes and ich the fuvileh raging i.-. fitted, lh' lhi rings lor the switch handle are independent of the eaingg and outside ot u'.

i l l the latter nia); be removed for inspeetion without di. nrbing the Said handle or its connection with the switch ineehanisrnf."

teferring to the accompanyiner drawing, each switch plate is shown as Composed. o1n two blades AY and li. The two bladeS at the heel end are embraced bv a blip C riveted to the outer blade A and piroted to their'lner blade ll. while the heel pivot of the blade pas through the said elip andl through the upper blade l) is the heel biaiin which the blade pivoted and Eel* the receiving clips serving as the circuit ter niinal@` whieh are to be eonnerted by nieans ot' thr` blade. The two blades are alao eonneeted on each side by diagonal springe (l, each attached at one end to the outer blade near-the toe. and at, the oppoeite end to the loner blade l al' a pointknear the heel of the blade. To the upper edge ot each outer blade pivoted a bracket ll projeetingl tranrsverelv troni the upper blade toward the opposite jaw and attached to an insulating block K. On the forward side ot the block l( are attaehed the ears L between which is pivoted at ithI lower end the handle P. The Said handle extends; upward and passes tlnough an eye or openingd in the overllandingy portion of the guidingY Stand ard R. The eye portion of this; Standard has a shoulder r which projects through an openingr in the external easing S so that its. outer surface is iueh with the outside Suf lace of the easing. The standar d it is pa ratei)VV attafhed to the insulating: fare and thtl l ing Si iS provided with an innulating lining.

The operation ot' the switch is by a push and pull movement. lt' the switch ie Closed, as shown by the full lines` in Figi. 2. the handle il will be pulled outward. drai-.viiiglf with it the outer bladen` Yl'he outerblal'les` will be first pulled awav from the Clip l" fin-'l lifted to about the poeition shown b v dotted lines:7 when the strain dn lh springs (l which connef't, the outer and inner blader` will become faullicienl to pull the inner blades too aivzj( from the t-lip, the Said inner blades taking: such :x1-ring; an may oreur on the rup lure ol' the short 'irfuit around the heater. it beiner umlerstood that the entire Current for all the healers in the ear will be paefiinfi through this i 'l rireuil. The rever-fie operation vlo.. s thf.x vilt-h, the handle l puahin;T both blades together into the clip l. l O

and the outer jaw A, which is not subjected to arf-ing, will insure a goed electrical contact between the blade and the clip.

What lV claim as new and desire to secure by Letters Patent is:

i. .-\n electric switch comprising a pair of parallel blades, an inwardly projecting lateral bracket carried by each blade, an insulating block connecting the brackets, a. pair o't' forwardly projecting ears carried by the block, and a handle pivotally connected to the ears.

2. .\\n electric switch comprising blades, laterally projecting brackets` Carried thereby, insulating means connecting the brackets, and an operating handle pivotally connected to the insulating means.

f5. An electric switch comp ','ng a base, supports carried thereby, a pair of switch blades pivotally connected to each support, cach pair of blades including an upper blade and a lower blade, brackets carried by the upper blades, an insulating connection for the brackets, and an operating handle pi\'- otally connected to the insulating' connection.

4. An electric switch comprising a base.r` supports carried thereby. a pair of blades, each pair of blades including an uppcrbiade and a lower blade, a bracket carried by each upper blade, an insulatingy connection between the brackets, a handle pivotall7 connected to the connection7 a clip carried by cach pair of blades, said clips being' rigidly fastened to the upper blades and pivotalijf fastened to the lower blade, means for i ix otally connectingr the clips and the upper blades to the supports, and a resiliert connection between the upper and lower blades.

In witness whereof l have hereunto sel my hand before two subscribingl .vitnessci, this 13th day of September. 1909.

JAMES l", MCCLROX lVitnesse-s Buchan CABLE, Jeux M. Es'rnnLY. 

